Help me

My kitten jumped up on the computer desk and now all of my text is really small, I've been trying for the last ten minutes to fix it but no such luck. Here is what my window looks like.Click here

EDIT: Sorry for my stupidity, I closed firefox and brung it back up, everything is fixed. Could a mod please close this.

Thats Dotsarecool, I just realized if I closed it, it would fix itself when I opened a new tab.